Entrex 480 / Nixdordf 620 System Operation Exploration (a list of screen menu options)

 Recorded near Brussels Belgium November 2021:

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And THIS is the tape that booted this system!

Original Early 1970s USA Entrex 480 Chassis Card Slots

 This chassis was from the July 2020 Frenchtown, NJ Auction

Digital Commputer Controls

Model No. D-116B

Serial No. 0293